2014 Fiscal Year Final Research Report
Superconductivity of heavily boron-doped nanodiamond films prepared by physical vapor deposition
| Project/Area Number |
24656389
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
TOMINAGA Aki 九州大学, 大学院総合理工学研究院, 助教 (50590551)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | ダイヤモンド / カーボン / ボロン / 超伝導 |
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| Outline of Final Research Achievements |
Boron-doped ultrananocrystalline diamond/hydrogenated amorphous carbon composite films were prepared by pulsed laser deposition and coaxial arc plasma deposition with boron-blended graphite targets. To study the superconductivity of the films, the susceptibility was measured by SQUID. Although the measurement were made for samples with enhanced volumes, the superconductivity were not observed. Thus, we concluded that the superconductivity should not appear. Cathode luminescence measurements implied that the films contain a huge number of defects in diamond lattices, in other words, nano-sized diamond grains have low crystallinities, which might be a reason for the disappearance of superconductivity.
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| Free Research Field |
薄膜工学
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